Malicious PDF — malware analysis report

Static analysis result for SHA-256 63d792493fc46a81…

MALICIOUS

PDF

80.8 KB Created: 2021-09-06 07:14:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d571a6ca231156ecdcc23cdf242062fd SHA-1: c725d68234bb2b7a8ffccfb0dacc059db3fab601 SHA-256: 63d792493fc46a8155ff3ddb2cb044a20de2228e55a039b2be0d261e9a01cce5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The file's structure and URL patterns are consistent with a spearphishing attachment used to lure victims to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://laborke.ru/uplcv?utm_term=wind+energy+generator+pdf PDF link annotation
    • https://santa.my/images/users/00000000/files/segumokalibuvigexifu.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/bddfb9f65c0d9ef2214d018ac6bda789/63897388989.pdfIn PDF document text
    • http://panziofabian.hu/fck_kepek/mabipuf.pdfIn PDF document text
    • http://lucchetta.net/userfiles/files/70834830658.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb0a6ed78f---famodevunuzexuxijexid.pdfIn PDF document text
    • http://tvcsoltau.de/userfiles/file/mager.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160f72f1f49c4e---sudotijukawi.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071b34e60433---32999399450.pdfIn PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/4c2c7b84624b191f0f37191da364e467/pujez.pdfIn PDF document text
    • http://cmi.nfe.go.th/ckfinder/userfiles/files/7357089712.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/9qi3ollo2djea7jmp7omsmne7t/tikusujidunupamezet.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607afa8a46607---73192053229.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bafc8402b23---75427498779.pdfIn PDF document text
    • http://getdol.com/page_data/file/ganab.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/dazukosatasejumifiwe.pdfIn PDF document text
    • https://dom4m.de/userfiles/files/zitosutokorusamidem.pdfIn PDF document text
    • http://tipsclubcr.com/campannas/file/60189700093.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/6e887f37c6273884900ea50436c8d1c5/66919589729.pdfIn PDF document text
    • http://rainbowcaterers.in/userfiles/file/zanamafuxarivad.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d84b7ac799---98649425685.pdfIn PDF document text
    • http://www.medicellbank.com/userfiles/files/97513516372.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad909961294---15046672554.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A5 18080 bytes
SHA-256: 8a6db1f8bba5f9cc2726d553f427f053bc64ccf42fc27b584329f34984204691
font_01_sfnt_off00010616.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10616 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E2D 10564 bytes
SHA-256: 66d153249a042df5541d8da3286f438d68a36b3c270df491aae595b677720053

Open this report in the interactive analyzer, or submit your own file for analysis.